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Outline before 1.12.0 Incorrect Authorization via authorizeDocumentPublish() Detached Draft

Affects Outline versions before 1.12.0 when a detached draft keeps its parent document, letting an authenticated workspace member publish into private collections. Fixed in 1.12.0.

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

5.3MediumCNA
Exploited
No known exploitation
Fix
Fixed in 1.12.0
Who is exposed
Specific setups only

Do first: Check whether your setup matches what the bug needs. Affected: Outline versions before 1.12.0 The document being published is a detached draft that still retains a parentDocumentId (created via documents.unpublish with detach: true) Attacker must be an authenticated workspace member who knows the destination private collection UUID

Published
Last modified
Published
Not listed in CISA KEV
13/100 · provisional
Specific setups only
Fix
Fixed in 1.12.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

Outline before 1.12.0 contains an incorrect authorization vulnerability in authorizeDocumentPublish() that allows authenticated members to publish documents into private collections without write access. Attackers can detach a child document via documents.unpublish, retaining parentDocumentId, then call documents.update with a private collection UUID to inject phishing content.

What to do

  • Check whether your setup matches what the bug needs.

    Affected: Outline versions before 1.12.0 The document being published is a detached draft that still retains a parentDocumentId (created via documents.unpublish with detach: true) Attacker must be an authenticated workspace member who knows the destination private collection UUID
  • Upgrade to a fixed version: 1.12.0.

Timeline

  1. CVE published
  2. First seen by cve.now
  3. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  4. Record last updated

Affected versions

  • Outline Outline

    fixed in 1.12.0

Evidence 5

  1. Advisory
  2. Patch
  3. Repository
  4. Repository
  5. Link

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

FAQ

Questions about CVE-2026-120489

What does this mean?

An authenticated workspace member can publish arbitrary documents into private collections they cannot access, which is an integrity problem with no confidentiality impact observed. It occurs when a detached draft still retains a parentDocumentId.Source: github.com

Am I affected, and how do I check?

Outline versions before 1.12.0 are affected, and the issue occurs when a detached draft retains a parentDocumentId, created via documents.unpublish with detach: true. The attacker must be an authenticated workspace member who knows the destination private collection UUID.Source: github.com

What should I do about it?

Upgrade Outline to version 1.12.0 or later, which contains the fix.Source: github.com

Is it being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data